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If in a stick of chalk, Carbon is 3 g, what is the weight of the chalk stick?

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Quantity of Carbon in chalk stick = 3 g Let the weight of chalk be x g.

Then, 12% of x = 3

Hence the weight of chalk stick is 25 g.

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Let weight of the stick be x gm.

 12% of x=3

(12/100)*x=3

x=3*(100/12)=25 gm

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